Airxcel 46101-8114, Service Manual

Page: 10 / 19

NO INDOOR BLOWER HIGH SPEED
COOLING MODE OR FAN ONLY
Note: All operating functions subject to thermostat and printed circuit board time delays.
-10-
115 VAC To Air
Conditioner
NO
Does APU Have Auto
Generator Start?
NO
Start Generator OR
Refer To Generator
Service Manual
YES
YES
12 VDC At Thermostat Wiring
Plug At Unit Red And Blue
NO Restore 12 VDC R+ B-
12 VDC At Thermostat Wiring Plug At Unit
There Are 2 Parallel Circuits To Energize Indoor Blower High Speed. This Is To Accommodate Auto
Gen Start Feature And Enable Motor To Run In Fan Only Operation If 115 VAC Is Already Present
12 VDC P.C. Board
GH & B
YES
Fan Only
Green & Blue
Cooling Mode
Yellow & Blue
YES
12 VDC At P.C.
Board GH & B
Refer To Auto Gen Checkout
115 VAC At
P.C. Board
High
NO
Check Low
Voltage Wiring
To Indoor Blower
Relay
Check Wiring And Connectors To
And At Thermostat. If All Are
Good, Replace Thermostat
YES NO
YES
NO
Check All 115 VAC Wiring
To P.C. Board Line 1 & Line
2. If Wiring Is Good,
Replace P.C. Board.
YES NO
Refer To No
Compressor
Operation
115 VAC
At P.C.
Board High
YES
NO
Check All 115
VAC Wiring To
P.C. Board L1 &
L2
Check Wiring And
Connections And
Fix As Needed
Check Wiring To Motor.
Check Capacitor, Motor
Windings. Fix Or Replace
NO
YES
Replace P.C. Board
Check Wiring To Motor.
Check Capacitor, Motor
Windings. Fix Or
Replace As Necessary.